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Wyświetlanie 1-10 z 80
Tytuł:
A movable string sieve - analysis of seed screening
Autorzy:
Kaliniewicz, Z.
Domański, J.
Powiązania:
https://bibliotekanauki.pl/articles/298132.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
string sieve
modeling
physical properties
Opis:
The conditions of seed movement in a string sieve set into reciprocating motion have been formulated for cereal, vetch, pea, lupine and faba bean seeds. In the analyzed string sieve, seed movement was determined by a combination of the following parameters: angular velocity of the crank, crank radius, seed size, seed’s coefficient of external friction, string diameter and angle of inclination of the separator screen. A string sieve for cleaning and sorting most farm-produced seeds was analyzed. The width of the separating groove was set at 1 mm at the beginning of the screen and 11 mm at the end of the screen, and the strings had the diameter of 4 mm. Our results indicate that seeds cannot be effectively graded in the modeled string sieve. The angular velocity of the crank exceeds the velocity which is applied to power conventional separator buckets, and it could damage the separator. A reduction in the angular velocity of the crank to the recommended level caused seeds to become jammed directly before the screening site. The above problem can be solved by propelling seeds into motion with the use of special sweeping brushes.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2013, 16(4); 253-264
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transverse momentum distributions and string percolation study in p+p, d+Au and Au+Au collisions at square rootsNN = 200 GeV
Autorzy:
Srivastava, B.
Scharenberg, R.
Tarnowsky, T.
Powiązania:
https://bibliotekanauki.pl/articles/148443.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
STAR
RHIC
percolation
string fusion
Opis:
Multiparticle production at high energies is described in terms of color strings stretched between the projectile and target. As string density increases, overlap among the strings leads to cluster formation. At some critical density, a macroscopic cluster appears, spanning the entire system. This marks the percolation phase transition. Data from p+p, d+Au and Au+Au collisions at 200 GeV has been analyzed using the STAR detector to obtain the percolation density parameter, eta. For 200 GeV Au+Au collisions, the value of h is found to lie above the critical percolation threshold, while for 200 GeV d+Au collisions it is below the critical value. This supports the idea of string percolation, which at high enough string density is a possible mechanism to explore the hadronic phase transition to a quark-gluon plasma.
Źródło:
Nukleonika; 2006, 51,suppl.3; 109-112
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applying a q-Gram based multiple string matching algorithm for approximate matching
Zastosowanie algorytmu wyszukiwania wielu wzorców opartego o technikę q-Gramów do wyszukiwania przybliżonego
Autorzy:
Susik, R.
Powiązania:
https://bibliotekanauki.pl/articles/952718.pdf
Data publikacji:
2017
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
text processing
approximate string matching
string algorithms
q-gram
przetwarzanie tekstu
wyszukiwanie przybliżone
algorytmy tekstowe
Opis:
We consider the application of multiple pattern matching (Multi AOSO on q-Grams) algorithm for approximate pattern matching. We propose the on-line approach which translates the problem from approximate pattern matching into a multiple pattern one (called partitioning into exact search). Presented solution allows relatively fast search multiple patterns in text with given k-differences(or mismatches). This paper presents comparison of solution based on MAG algorithm, and [4]. Experiments on DNA, English, Proteins and XML texts with up to k errors show that the new proposed algorithm achieves relatively good results in practical use.
Rozważamy zastosowanie algorytmu wyszukiwania wielu wzorców (Multi AOSO on q-Grams) do wyszukiwania przybliżonego. Proponujemy rozwiązanie on-line, upraszczające problem wyszukiwania przybliżonego do wyszukiwania wielu wzorców. Zaprezentowane rozwiązanie umożliwia relatywnie szybko wyszukiwać wiele wzorców dla odległości Levenshteina (lub Hamminga) z ograniczeniem do k. W artykule porównane jest rozwiązanie oparte na algorytmie MAG oraz [4]. Badania eksperymentalne przeprowadzone na zbiorach DNA, English, Proteins and XML z różnymi wartościami k wykazały, że zaproponowany algorytm osiąga relatywnie dobre wyniki w praktycznym zastosowaniu.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2017, 7, 3; 47-50
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The basis property of eigenfunctions in the problem of a nonhomogeneous damped string
Autorzy:
Rzepnicki, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/254937.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
nonhomogeneous damped string
Hilbert space
Riesz basis
modulus of continuity
basis with parentheses
string equation
Opis:
The equation which describes the small vibrations of a nonhomogeneous damped string can be rewritten as an abstract Cauchy problem for the densely defined closed operator iA. We prove that the set of root vectors of the operator A forms a basis of subspaces in a certain Hilbert space H. Furthermore, we give the rate of convergence for the decomposition with respect to this basis. In the second main result we show that with additional assumptions the set of root vectors of the operator A is a Riesz basis for H.
Źródło:
Opuscula Mathematica; 2017, 37, 1; 141-165
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single–word self–referential sentences
Autorzy:
Laudański, Ludomir M.
Powiązania:
https://bibliotekanauki.pl/articles/421309.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
Grelling‟s paradox
logic
string variables
Opis:
The paper discusses the well-known logic paradox formulated by Grelling. It belongs to the class of paradoxes known as Russell's paradoxes. Analysing Grelling‟s paradox, the author arrives at the conclusion showing its apparent nature, in other words resolving the problem.
Źródło:
Didactics of Mathematics; 2013, 10(14); 57-64
1733-7941
Pojawia się w:
Didactics of Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topos długich uszu. Transfiguracje symbolu królika
Topos of Long Ears. Transfigurations of the Rabbit Symbol
Autorzy:
Walczak, Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/555541.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
symbol
Ricoeur
Barthes
semiotics
metonymic string
Opis:
The article is focused on the analysis of transfiguration of an archaic symbol within contemporary popular culture. The theoretical framework is Ricoeur’s theory of symbol and Barthes’s semiotics. The author attempts to show how metonymic strings are gradually modified upside down.
Źródło:
Załącznik Kulturoznawczy; 2014, 1; 87-102
2392-2338
Pojawia się w:
Załącznik Kulturoznawczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Physical Model of the Nonlinear Sitar String
Autorzy:
Siddiq, S.
Powiązania:
https://bibliotekanauki.pl/articles/177221.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sitar
physical modelling
nonlinear string vibration
dispersion
Opis:
The acoustic properties of the sitar string are studied with the aid of a physical model. The nonlinearity of the string movement caused by the bridge acting as an obstacle to the vibrating string is of special interest. Comparison of the model’s audio output to recordings of the instrument shows interesting similarities. The effects dispersion and bridge have on the sound of the instrument are demonstrated in the model.
Źródło:
Archives of Acoustics; 2012, 37, 1; 73-79
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Theoretical Analysis of Cereal Seed Screening in a String Sieve
Autorzy:
Kaliniewicz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/298351.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
string sieve
modelling
seeds
angle of inclination
Opis:
The conditions of the screening process in a fixed string sieve designed by the author have been formulated. The string sieve was designed for separating seeds of 5 cereal species (wheat, rye, barley, oats and triticale). The width of the separating groove was set at 1 mm at the beginning of the screen and 5 mm at the end of the screen. It has been assumed that seeds have a spheroidal shape and that their motion is initiated by positioning the string sieve at an appropriate angle. The results of a theoretical analysis revealed that at the given parameters of a string sieve, the above angle is determined only by the thickness and width of separated seeds. The sieve’s angle of inclination should be set at 45° to propel seeds into motion and at 50° to ensure the continuity of the screening process. Such a large setting angle is not recommended because it increases the sieve’s height and deteriorates the quality of the separation process. The problem can be solved by setting the separator bucket into motion and separating seeds at a small inclination angle of the string sieve.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2013, 16(3); 234-247
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applicability of the Capstan Equation to Guitar Strings
Autorzy:
Groves, Tom
Kemp, Jonathan A.
Powiązania:
https://bibliotekanauki.pl/articles/177570.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
guitar
string
friction
saddle
capstan
equation
bridge
Opis:
The effects of friction were observed in electric guitar strings passing over an electric guitar saddle. The effects of changing the ratio of the diameter of the winding to the diameter of the core of the string, the angle through which the string is bent, and the length on either side of the saddle were measured. Relative tensions were deduced by plucking and measuring the frequencies of vibration of the two portions of string. Coefficients of friction consistent with the capstan equation were calculated and were found to be lower than 0.26 for wound strings (nickel plated steel windings on steel cores) and lower than 0.17 for unwound (tin plated steel) strings. The largest values of friction were associated with strings of nar rower windings and wider cores and this may be due to the uneven nature of the contact between the string and saddle for wound strings or due the surface of the windings deforming more, encouraging fresh (and therefore higher friction) metal to metal contact. It is advised to apply lubrication under the saddle to string contact point after first bringing the string up to pitch rather than before in order to prevent this fresh metal to metal contact.
Źródło:
Archives of Acoustics; 2019, 44, 3; 459-465
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
String sieve: design concept and parameters
Autorzy:
Kaliniewicz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/298037.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
seed
cleaning
sorting
geometric parameters
string sieve
Opis:
This paper presents the design concept and the parameters of a new device for cleaning and-or sorting seeds and grain produced in a conventional farm. The discussed device is a string sieve where the groove between adjacent strings is minimal at the beginning of the screen and increases towards the end of the screen. The proposed sieve poses an alternative to a screen separator comprising a set of differently-sized mesh screens with longitudinal openings. In view of the average size of farm-produced seeds, the width of the separating groove should be set at 1mm at the beginning of the screen and 11 mm at the end of the screen. In sieves not designed for grading large seeds or vetch seeds, the width of the separating groove can be set at 1 mm and 5 mm, respectively.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2013, 16(2); 119-129
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 80

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